400 Scientific Intelligence. 



9. Deuxieme Memoir e sur les Algues Marines du Greenland ; 

 by L. Kolderup Rosenvinge. Meddelelser om Gronland, xx, 

 pp. 1-125, pi. i and 25 figs., 8°. Copenhagen, 1898. Om Alge- 

 negetationen ved Gr inlands Kyster ; ditto, pp. 131-242. — The 

 paper first named is an important supplement to the author's 

 Groenlands Havalger published in 1893. The material studied 

 included the collections made by N. Hartz, principally at Scoresby 

 Sound during the expedition to East Greenland under Lieut. 

 "Ryder and those made by A. Jessen and C. Ostenfeld in West 

 Greenland, besides a few smaller collections. Of the algae of the 

 eastern coast, which had been less thoroughly explored than the 

 western, only 32 species had been previously enumerated, but in 

 the present work the number is estimated at 82 including several 

 new species. The number of species previously known on the 

 west coast was 143, which number is now increased to 167 includ- 

 ing in the enumeration the species reported by Kuckuck from 

 Umanak collected by Vanhoffen. The Lithothamnia were 

 revised by Foslie. Among the novelties are three new genera, 

 Ceratocolax, Dermatocelis and Arthrochoete, each represented by 

 a single species of parasitic habit. The paper is well illustrated 

 and the notes are full and suggestive. The second paper by Dr. 

 Rosenvinge is a valuable contribution to our knowledge of the 

 distribution of the marine floras of the North Atlantic, which 

 gives details as to the temperature and other factors which affect 

 the growth of marine plants and tables showing the relations of 

 the Greenland flora to those of northern Europe and the Atlantic 

 coast of North America. In spite of the remoteness and inclem- 

 ency of the Greenland coast, thanks to the publications of Rosen- 

 vinge, Kjellman and other Scandinavian algologists, its marine 

 flora is more accurately known than that of any other portion of 

 the Atlantic coast of America. w. g. f. 



10. Monographie des Caulerpes ; by Mme. A. Weber-van 

 Bosse, Ann. Jardin Bot. Buitenzorg, xv, pp. 243-401, pi. xx- 

 xxiv. — In a short introduction the author gives a summary of 

 what is known regarding the cell structure with notes as to the 

 probable fructification of the species of this large and. peculiar 

 genus, for, in spite of their abundance and wide distribution in 

 all warm seas, no one has as yet succeeded in detecting with cer- 

 tainty their method of reproduction. The monograph is essen- 

 tially a systematic study of the species for which the author is 

 especially well qualified, since her excursions to the tropics have 

 given her abundant opportunity for observing the Caulerpae in a 

 living condition, while, on the other hand, she has been able to 

 examine the dried specimens of practically all of the large algo-. 

 logical herbaria. The subdivisions of the genus adopted are 

 those of Prof. J. G. Agardh, but the number of species recog- 

 nized by Mme. Weber is considerably smaller than in other 

 works on the genus. In thus uniting the older described species 

 the author, we think, has shown good judgment, and her excellent 

 presentation of the subject gives a much better view of the genus 



